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www.impco.ws
IMPCO Technologies Inc
Santa Ana, California


SEQUENT STANDARD
BRC MULTIPOINT SEQUENTIAL INJECTION SYSTEM
@ƒJƒ^ƒƒO Catalog Download (PDF 1980KB)



The system make-up

The BRC multipoint sequential injection system is based on components validated in the automotive field by carmakers, such as:
the refuelling point, the tank, the pipes reaching the front of the vehicle, the gas cut-off solenoid valve, the reducer-vaporiser of the GENIUS and GENIUS MAX type, the injectors, the rubber connection pipes, the gas/petrol changeover switch with gas level gauge, the gas pressure and temperature sensors and the MAP sensor, the gas level sensor; and on innovative components conceived to assure and improve safety or to implement new functions, such as:
the Europa multivalve, the Fly SF ECU, the injectors rail.


Functions

The control of the fuel-air mixture titer is assured by the original petrol ECU while running on gas too (system of the series type); the gaseous injection system is only aimed at turning
the control sent from the petrol ECU to the injectors into an equivalent control to the gas injectors. The whole diagnostic performed by the petrol ECU is this way preserved and kept
on working while running on gas too (apart from the control of the petrol injectors that are excluded while running on gas), assuring the OBD compatibility. The petrol injection times-gas injection times translation is carried out through predictive algorithms enabling the gas injection in every cylinder during the petrol injection on the corresponding injector.

The Fly SF ECU measures the gas pressure that feeds the injectors and rectifies the gas injection times depending on the value read, it makes practically the gas quantity injected independent compared with the small pressure variations.

The series operation of the system assures and preserves the strategies used by the carmaker, as the management of the out-of-revs and of the cut-off in tip-out, the drive control, the cut-off of injectors on the cylinders where the missed ignitions are spotted, and the control of carburetion during the drain phase of the can.

The petrol injection times-gas injection times translation maps are functions of the engine r.p.m. and of the manifold absolute pressure (MAP) and are automatically varied by a self-adaptative strategy that pursues the possible wear and tear of both systems. We assure this way that the gas system behaviour repeats, in very instant of the system life, the behaviour of the specific vehicle being equipped.

The OBD compatibility is assured by the system working principle of the series type and by the sophisticated diagnostic of the sensors and of the actuators carried out by the gas ECU. In the event of failure of an original component of the vehicle, the petrol ECU will be able to regularly diagnose it. The vehicle will be therefore always able to run in observance of the OBD norms. Therefore the vehicle will be always able to work respecting the OBD rules.

In case of exhaustion of LPG, the changing-over to petrol occurs automatically. It is especially comfortable and safe as the user can keep on driving undisturbed, without operating on the changeover switch. The automatic changing over to petrol could be immediately indicated to the driver, through a buzzer and special optical signals. Also the changeover from a fuel to another is in sequential way. By following a patented strategy, the Fly SF ECU is able to act the changeover on each cylinder one at a time, making so unnoticed the change from a condition to the other in every driving condition.

It has been paid particular attention, in order to obtain an advanced gas feeding system with the maximum technological knowledge, but in the meantime versatile and easy to use.
For this reason SEQUENT is a gopenh system, usable both on vehicles developed by BRC, and on those vehicles directly developed by installers duly trained.
In the point of view to assure a rugged and reliable system, all the protections and precautions asked to BRC by the carmakers have been taken (filters, waterproof connections, protections
from installation mistakes, etcc).

The sequential injection of SEQUENT allows to obtain excellent results for what concerns polluting emissions, always assuring the performances and a very good driving level.

The capacities to feed are over 30 kW per injector, being able to pilot up to 8 injectors, 240 kW in all corresponding to 326 HP; vehicles provided with aspirated or supercharged engines can be installed indifferently.






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